1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.car.media; 18 19 import android.car.media.CarVolumeGroupEvent; 20 21 /** 22 * Binder interface to callback the volume group info changes. 23 * 24 * @hide 25 */ 26 oneway interface ICarVolumeEventCallback { 27 /** 28 * This is called when audio framework acts on events that causes changes to 29 * {@link android.car.media.CarVolumeGroupInfo}. 30 * The callback includes a list of {@link android.car.media.CarVolumeGroupEvent}. 31 * Each event contains event-types (what has changed), list of volume group infos 32 * and additional information (why it has changed). 33 */ onVolumeGroupEvent(in List<CarVolumeGroupEvent> volumeGroupEvents)34 void onVolumeGroupEvent(in List<CarVolumeGroupEvent> volumeGroupEvents); 35 36 /** 37 * This is called whenever the master mute state is changed. 38 * The changed-to master mute state is not included, the caller is encouraged to 39 * get the current master mute state via {@link android.media.AudioManager}. 40 */ onMasterMuteChanged(int zoneId, int flags)41 void onMasterMuteChanged(int zoneId, int flags); 42 } 43